Running Kibana (I tried different versions, from 6.5.x to 7.1.1) with Metricbeat 6.7.1 and 7.1.1 I see several errors in Kibana:
- Unable to see metricbeat-* index pattern in Kibana: Request Timeout error
- Unable to open the Discover panel in Kibana: Request Timeout error
- Some system dashboard panels fail to load for timeout
See here for further details: Kibana fails to create metricbeat index pattern
Finally I tried Metricbeat 6.7.0, and everything started to work as expected (both with ES/Kibana 6.5.3 and 6.7.1).
My guess is that there is something in the Elasticsearch templates starting from v. 6.7.1 that prevents Kibana to correctly generate/manage the index pattern.